Improvement in automatic pressure-regulators



, J. J. KENNEVAN. Automatic Pressure-Regulator.

No. 206,248.. Patented july23, I878.

NJFI'ERS, PHOTO-LITHOGRAPHEE WASHINGTON. D C.

UNITED STATES PATENT OFFICE,

JOHN J. KENNEVAN, 013 BOSTON, MASSACHUSETTS.

IMPROVEMENT lN AUTOMATIC PRESSURE-REGULATORS.

Specification forming part of Letters Patent No. 206,248, dated July 23,1878; application filed June 15, 1878.

To all whom it may concern Be it known that I, J OHN J. KENNEVAN, ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented an Automatic Pressure-Regulator for chandeliers, brackets, andother gas-fixtures, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawin gs, makingpart of this specification, in which Figure l is a perspective view ofmy pressure -regulator applied to a gaschandelier. Fig. 2 is alongitudinal vertical section through the center of the same.

My invention has for its object to provide a pressure-regulator forchandeliers and other gas-fixtures by means of which the quantity of gasconsumed by the burner or burners can be automatically regulated withoutregard to the pressure of the gas in the pipes or the number of burnersin use; and my invention consists in a novel means of connecting theburner-pipes with a chamber provided with a flexible diaphragm, to whichis attached the stem of a valve through which the gas is admitted fromthe supply-pipe to the chamber.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out.

In the said drawings, A represents a chandelier, at the center of whichis a short vertical tube, a, to the top of which is attached a chamberor receptacle, B, provided with a hinged cover, I), this chambercommunicating at its bottom with the tube a, which also communicateswith the branch pipes c (I, provided with stop-cocks e and burners f.

Through 'the closed bottom of the tube (0 passes the supply-pipe O,which extends up into the bottom of the chamber B, where it is providedwith a screw-plug, it, through which is formed a conical aperture, 1',the sides of which constitute a seat for the conical valve k, thevertical stem 1 of which is attached to plates at of a flexiblediaphragm, D, by means of a screw-thread cut on the top of thevalvestem, whereby the position of the valve k with respect to its seatand the consequent size of the inlet-aperture t can be regulated so asto vary the amount of gas consumed by each burner, the hinged cover I)being thrown back when access is to be had to the valve-stem.

The diaphragm is stretched over a vertical flange, a, and securedthereon by means of a ring, 2, forced over it. The valve 7; havmg beenproperly adjusted so that a single burner will consume a given number offeet of gas per hour, (which can be determined by actual experiment,)the gas flows up through the pipe 0 and conical aperture 1? into thechamber B, and thence down into the tube a to the branch pipes c (l andburners f when the stop-cocks e are open; and when a burner is lightedthe pressure of the gas on the under side of the diaphragm D is suchthat the valve It will be maintained at such a distance from its seat asto admit the exact quantity of gas desired; and should one or moreadditional burners be lighted the pressure of the gas on the under sideof the diaphragm will be reduced, causing the valve to descend, and thusenlarge the inlet-aperturei so as to admit just the amount of gasnecessar to supply to each burner the predetermined number of feet ofgas per hour, and the pressure of the gas is thus equalized, so thatwhen the valve 7; is once adjusted the quantity of gas consumed by eabhburner will not vary, however much the pressure may vary in thestreetanain; and as the number of burners in use is increased ordiminished the position of the valve 7- through the connectionsdescribed will be varied so that the pressure and consequent amount ofgas consumed by each burner'will always be the same without regard tothe number in use until a new adjustment of the valve k is effected.

I am aware that a valve operated by a flexible diaphragm through themedium of the gas-pressure is not new, and hence I make no claimthereto; but

hat I claim as my invention is- The supply-pipe O, diaphragm-chamber B,diaphragm l), and valve is, in combination with tube a, surroundingsupply-pipe O, and provided at its lower end with branch pipes c d, allconstructed and arranged as set forth.

Vitness my hand this 12th day of June, 1878.

P. E. TESCI-IEMAOHER, W. J. CAMBRIDGE.

